Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong cac cac snippets" » "cuong cac cac snippets", "cong tac cac snippets", "cong cau cac snippets", "cong cac cach snippets", "cong ca cac snippets", "cong cac bac snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong cac cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong cac cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cac cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cac cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.